UITextField文本不在左侧滚动

Question

我有一个UITextField子类,我已经覆盖了一些方法(见下面的代码).问题是,当我输入它并且文本达到严格边距时,它将不再显示我正在键入的内容.在视图调试模式中,我看到UIFieldEditor文本提交的范围要宽得多.

这是UITextFiled子类代码:

- (instancetype)init
{
    self = [super init];
    if (self) {
       self.edgeInsets = UIEdgeInsetsMake(7, 0, 10, 15);
    }
    return self;
}

- (id)initWithFrame:(CGRect)frame{
    self = [super initWithFrame:frame];
    if (self) {
        self.edgeInsets = UIEdgeInsetsMake(7, 0, 10, 15);
    }
    return self;
}

-(id)initWithCoder:(NSCoder *)aDecoder{
    self = [super initWithCoder:aDecoder];
    if(self){
        self.edgeInsets = UIEdgeInsetsMake(7, 0, 10, 15);
    }
    return self;
}

- (CGRect)textRectForBounds:(CGRect)bounds {
    return [super textRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}

- (CGRect)editingRectForBounds:(CGRect)bounds {
    return [super editingRectForBounds:UIEdgeInsetsInsetRect(bounds, self.edgeInsets)];
}

这是我使用这个类的代码:

// alloc / init 
        _myTextField.delegate = self;
        _myTextField.backgroundColor = [UIColor whiteColor];
        _myTextField.layer.masksToBounds = YES;
        _myTextField.layer.cornerRadius = 3.0;
        _myTextField.returnKeyType = UIReturnKeyDone;
        _myTextField.clearButtonMode = UITextFieldViewModeWhileEditing;
        _myTextField.autocapitalizationType = UITextAutocapitalizationTypeWords;
        _myTextField.autocorrectionType = UITextAutocorrectionTypeNo;
        _myTextField.hidden = YES;

        _tfButton = [UIButton buttonWithType:UIButtonTypeSystem];
        [_tfButton setImage:[UIImage imageNamed:@"ic_edit"] forState:UIControlStateNormal];
        [self fs_addSubview:_tfButton];
        [_tfButton constrainWidth:22.];
        [_tfButton setTintColor:[UIColor greenColor]];
        [_tfButton constrainHeight:22.];
        [_tfButton constrainToRightOfView:_myTextField margin:-25.0];
        [_tfButton constrainEqualCenterYWithView:_myTextField offset:0.0];
        [_tfButton setUserInteractionEnabled:NO];


        UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 5, 5)];

        _myTextField.leftView = leftView;
        _myTextField.leftViewMode = UITextFieldViewModeAlways;

当用户在此文本字段中键入大字符串时,如何让文本在左侧滚动？

Answer 1

你的代码是完全正确的.问题来自UITextField班级.当您放入UITextField故事板中的a ,并将其fontSize和minFontSize设置为50.此系统textField将与您的自定义textField具有相同的问题.

这只是因为UITextField不知道如何在狭窄的空间中绘制大字体.

我使用了textField的子类(默认高度为30),在将字体大小更改为7之后,一切正常.

Answer 2

我遇到了同样的问题，但我没有任何 UITextField 子类。问题是文本字段在文本字段高度和字体大小之间有一定的比例。将字体大小增加到高于特定值 wrt 文本字段高度会导致此问题。我所做的是稍微减小字体大小，然后文本字段再次开始工作。